old-fashioned, small rooms but an Irish-like friendly hospitality then Phoenix Park.  If you're into Irish Pubs, the Phoenix Park is connected to the Dubliner, one of DC's finest.  You might take a look at the Liaison Hotel, just across the street from the Hyatt and possibly a better bargain.   They're all within a block or two of each other, Washington Court & Hotel George also nearby.  And all a 5-minutre or so walk from Union Station.

Go for Liaison (rooms are snug, but cool and restaurant is tops) or hotel George (very cool rooms, most are ample for fun activities)

George has most discrete elevators -- can get to them without parading by front desk